Finding the Fourth Proportional to 13,456.82, 18,569.63 and 7,791.17

Step by Step Solution

1. Step 1: Write the proportion equation
   13,456.82 : 18,569.63 = 7,791.17 : x
2. Step 2: Convert to fraction form
   13,456.82/18,569.63 = 7,791.17/x
3. Step 3: Cross multiply
   13,456.82x = 18,569.63 × 7,791.17
4. Step 4: Simplify right side
   13,456.82x = 144,679,012.36
5. Step 5: Solve for x
   x = 144,679,012.36/13,456.82
6. Step 6: Final answer
   x = 10,751.35